lint: clippy::cast_lossless and clippy::unreadable_literal lints

src/utf8.rs

@@ -813,10 +813,11 @@ pub fn decode_last_lossy<B: AsRef<[u8]>>(slice: B) -> (char, usize) {
 #[inline]
 pub fn decode_step(state: &mut usize, cp: &mut u32, b: u8) {
     let class = CLASSES[b as usize];
+    let b = u32::from(b);
     if *state == ACCEPT {
-        *cp = (0xFF >> class) & (b as u32);
+        *cp = (0xFF >> class) & b;
     } else {
-        *cp = (b as u32 & 0b111111) | (*cp << 6);
+        *cp = (b & 0b0011_1111) | (*cp << 6);
     }
     *state = STATES_FORWARD[*state + class as usize] as usize;
 }